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Madison A. Estes is an analyst with CNA's Strategy and Policy Analysis program. Her expertise is in nuclear weapons policy and arms control. Her research portfolio includes deterrence, extended deterrence, escalation, strategic stability, ballistic missile defense, and arms control.

Prior to joining CNA, Estes interned with the Nuclear Threat Initiative, where she worked on the International Partnership for Nuclear Disarmament Verification (IPNDV) partnership with the U.S. Department of State. She also interned with the U.S. Embassy in London in the Office of Network Engagement and with the Verification Research, Training and Information Centre (VERTIC), where she was a contributing author to their quarterly publication, Trust & Verify.

Estes holds a master's degree in non-proliferation and international security from King's College London, where she completed her dissertation on the contribution of the New START Treaty to U.S.-Russia strategic stability. She received her bachelor's degree in international relations and global studies with a concentration in international security from the University of Texas at Austin. She is a member of the 2019 CSIS Project On Nuclear Issues Nuclear Scholar's Initiative.